- Archery3
- Archery in literature1
- Archival materials2
- Archives74
- Arcibucci, Alessandro1
- Arcispedale Santa Maria Nuova (Reggio Emilia, Italy)1
- Ardabīlī, Aḥmad ibn Muḥammad, -1585. Majmaʻ al-fāʼidah wa-al-burhān fī sharḥ Irshād al-adhhān1
- Ardabīlī, Muḥammad ibn ʻAbd al-Ghanī, -1249 or 1250. Sharḥ al-Unmūdhaj1
- Ardinghelli, Rinaldo degli1
- Argonauts (Greek mythology)1
- Aringhello, Tommaso di1
- Aristotle10
- Aristotle. Theologia1
- Arithmetic31
- Arjuna (Hindu mythological character)11
- Armada (1588)3
- Armaiolo, Francesco2
- Armaiolo, Puccino1
- Armaleoni, Benedetto degli1
- Armayūnī, Yūsuf ibn ʻAbd Allāh, -15512